Which three operations require undo data?

Which three operations require undo data? (Choose three.)

Which three operations require undo data? (Choose three.)

A.
Flashing back a transaction

B.
Recovering a failed transaction

C.
Committing a transaction

D.
Changing a tablespace status from READ ONLY to READ WRITE

E.
Running a read-consistent query



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mr_tienvu

mr_tienvu

I choose ABE